So, I must say I'm at my wits end. I've been getting complete system freezes while going about my business, happening while doing various things. I could be simply browsing, playing games, watching video, and sometimes doing nothing. I don't BSOD, everything just locks. The mouse cursor won't move, no keyboard input, video and audio playback completely stop. Nothing responds. I've done the usual making sure my drivers are up to date, I've checked to make sure everything is securely connected (to my knowledge) inside the case. In addition to that, while trying to burn discs or rip from a cd, my optical drive will "disconnect" and stop showing up as a connected device. In the same vein, i have two hard drives, an SSD and an HDD. When playing games that are installed on the HDD, the HDD will sometimes incur the same issue as the optical drive, and will "disconnect" (you can hear the remove device sound play) and no longer show up, causing the game to crash and force me to restart the computer. It only seems to happen when im playing a game (notably diablo 3), but never at any other time that i can recall. These issues are all leading me to think that maybe there is a problem with my MB communicating with the devices attached? I honestly don't know at this point and am reaching out for help. I've been dealing with this with varying frequency on and off for about a year, trying to figure out what to do, and out of stubbornness have yet to ask for assistance. Now, I know there are logs that can be pulled or events that you guys can look at to determine what the problem is, i just don't know what or where to look to go about doing that. As for what i've got in the case: processor: i7-3820 cpu @3.6ghz mb: asrock x79 extreme4 videocard: asus radeon hd7870 2g ram: 16g gskill ripjaws I don't know what else you guys might need, but feel free to let me know. I really would appreciate any and all help.